Looking at the image and the labelings critically, the site of blood filtration, otherwise known as the glomerulus, is labeled as A.
The kidney functions primarily in the process of excreting substances such as urine and toxic drugs.
The excretory substances in the blood are filtered off in the glomerulus of the kidney.
The structure marked A represents the glomerulus. C is known as the Bowman's capsule.
Thus, blood filtration happens at A.
More on glomeruli can be found here: https://brainly.com/question/2917527
